Process of packing powdery substances.



No. 704,728. Patented July l5, |902.

K A. wuLTzE.

PROCESS 0F PACKING POWDERY SUBSTANCES. A

(Application led Nov. 13, 190D.)

(No Model.) 2 shetssheef l.

Nu. 704,728. Patented my l5, i902.

- A. wuLTzE. PRUCESS 0F PACKING POWDERY SUBSTANCES.

{Applicaton led Nov* 13, 1900.) (No Modei.) 2 Sheets-Sheet 2.

UNITED STATES 'PATENT OFFICE.-

ADOLPH W'ULTZEOF CHARLOTTENBURG, GERMANY.

PROCESS oF PACKINGy POWDERY suss'rnlvoi-zs.l

SPECIFICATION forming part of Letters Patent No. 704,728, dated July 15, 1902.

Application led November 13, 1900i Serial No. 36,391. (No specimens) To -afZ/Z whom it may concern: l i p Be it known that I, ADOLPH VVULTZE, a subject of the King of Prussia, German Emperor,4

and a resident of 8 Salz Ufer, Charlottenburg, near Berlin,Kingdom of Prussia,German Empire, have invented an Improved Process of Packing Powdery Substances, of which the'` following is an exact speciiication.

In packing up powderous substances great dlicultles arise, as Well known, because the little grains of the powdery mass do not set tightly upon each other, but inclose moreor,

less air between them. In consequence hereof much space would be wasted when the packing up would be executed Without a-previous special treatment. It has Vtherefore been tried to withdraw the air from the substances by means Aof an air-pump and afterward compress the substanceby means of a press.Y

This process is, however, very expensive on account of not only an air-pump, but also a press, being necessary for carrying the same into eifect, which press necessitatesa great power. In order to do awayzwith this disadvantage, I provide my new process by means of which it is attained, that the arrangement of a special press for compressing the substance is entirely unnecessary. y y

In order to make my invention more clear, I will proceed to describe the same at the hand of the accompanying drawings, in which A an apparatus is shown which may serve for carrying my process into effect.

Figure 1 is a vertical section of this apparatus in an open position. Fig. 2 is a front view of the same in a closed position. Fig. 3 is a top view of the same in closed position.

a is a receiver, one side wall of which can be taken o or is hinged to the same, as shown in the drawings. Fig. 1 shows this side wall turned up. In this position a box c, iilled with the' substance to be compressed, is brought into'the receiver a. Hereafter the side wall is closed, as shown in Figs. 2 and 3 of the drawings. V'Iothe receiver 'aa pipe is connected, which leadsto an air-pump, as may be seen inFig. 3, so that the receiver a can be pumped out. By rarefying the air in the receiver the air inclosed between the little grains of the powdery substance contained in the box c will naturally also be rareiied. YAs

soon as a vacuum is created in the receiver a the walloping movement will cease. Hereafter the connectiolrof the receiver with thev air-pump is cut off by means of a valve situ ated in the connection-pipe. In order' to be able to recognize whether the air within the receiver a is suiciently rareed, a manometer may be connected to'the same. After the connection of the receiver with the air-pump is cut o a valve b, connecting the'receiver with ftheouter atmosphere, is opened, so that the substance contained in the box c is suddenly exposed to the pressure of the, outer atmos phere. As the air inclosed between the mole= cules or little grainsl of the mass is rareiied, these molecules or grains will be pressed tightly-upon each other by the atmospheric pressure. f

It will be understood that the'arrangement of the boxic is notv absolutely necessary, as the substance to be compressed can be brought directly into the receiver a; It is evident that the powdery mass which in the beginning of the process has filled the receptacle to the very top would not ll ythe same after the compression, sothat if not pa-` per bags orsacks but receptacles with stiii walls are employed the process would have to be repeated several times in order to completely iill the receptacle.

Having thus fully described the nature of this invention, what I desire to secure by Letters Patent of the United States is- A process for packing powdery substances, consisting in rarefying the air'held among the particles of the substances and then exposing the same to the atmospheric pressure, substantially as described Aand for the purpose set forth. l

In testimony whereof I have signedmy name to this specification'in l,the presenceof two subscribing witnesses.

WOLDEMAR HAUPT, HENRY HASPER.

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